Mariota's coach actually is a pretty good qb coach. He is tailoring the offense to his strength. Head coach name escapes me
Ken Whisenhunt. He is an excellent QB coach, not sure how good a HC he is though. He hasnt deviated his system that much though. Some plays here and there sure, but he isn't doing much different than he did when he was OC for the Chargers before he came to TN.